Merge commit 'b9bd35d72e14932fb6588ff62b90cddef0a060fc' as 'docs'

docs/content/en/functions/first.md

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+---
+title: first
+linktitle: first
+description: "Slices an array to only the first _N_ elements."
+godocref:
+date: 2017-02-01
+publishdate: 2017-02-01
+lastmod: 2017-02-01
+categories: [functions]
+menu:
+  docs:
+    parent: "functions"
+keywords: [iteration]
+signature: ["first LIMIT COLLECTION"]
+workson: [lists,taxonomies,terms,groups]
+hugoversion:
+relatedfuncs: [after,last]
+deprecated: false
+aliases: []
+---
+
+`first` works in a similar manner to the [`limit` keyword in
+SQL][limitkeyword]. It reduces the array to only the `first N`
+elements. It takes the array and number of elements as input.
+
+`first` takes two arguments:
+1. `number of elements`
+2. `array` *or* `slice of maps or structs`
+
+{{< code file="layout/_default/section.html" >}}
+{{ range first 10 .Pages }}
+    {{ .Render "summary" }}
+{{ end }}
+{{< /code >}}
+
+*Note: Exclusive to `first`, LIMIT can be '0' to return an empty array.*
+
+## `first` and `where` Together
+
+Using `first` and [`where`][wherefunction] together can be very
+powerful. Below snippet gets a list of posts only from [**main
+sections**][mainsections], sorts it by the `title` parameter, and then
+ranges through only the first 5 posts in that list:
+
+{{< code file="first-and-where-together.html" >}}
+{{ range first 5 (where site.RegularPages "Type" "in" site.Params.mainSections).ByTitle }}
+   {{ .Content }}
+{{ end }}
+{{< /code >}}
+
+
+[limitkeyword]: https://www.techonthenet.com/sql/select_limit.php
+[wherefunction]: /functions/where/
+[mainsections]: /functions/where/#mainsections